Housewife Tang Guo and her husband, Mu Bai, decide to divorce, but an accident sends them back to their teenage years in the 1990s. Seeing her long-deceased mother, Tang Guo is overwhelmed and determined to save her father, Tang Zhiqiang, from a fatal factory explosion. However, no one believes her, especially Bai Wei. When the explosion happens, Mu Bai rescues Tang Zhiqiang, making Tang Guo suspect he has also time-traveled. To secure their future, Tang Guo secretly wins the lottery, only to discover Mu Bai has done the same. She opens a clothing factory to pursue her teenage crush, Song Yu, but Mu Bai becomes her business rival. Both swear never to reunite and start new relationships, yet fate keeps pulling them together. Through their second chance, they eventually overcome past grievances and reconcile.